Question

giúp mình nha

Answer 1

1.\(S=9,6m,g=a=9,8m/s^2\)

\(\Rightarrow S=\dfrac{1}{2}gt^2=\dfrac{1}{2}.9,8.t^2=4,9t^2\Rightarrow t=\sqrt{\dfrac{S}{4,9}}=1,4s\)

\(\Rightarrow v=vo+gt=9,8.1,4=13,72m/s\)

2.\(\Rightarrow S=\dfrac{1}{2}gt^2\Rightarrow S=\dfrac{1}{2}.9,8.3^2=44,1m\)

3.\(\Rightarrow S=\dfrac{1}{2}gt^2=44,1m\)

\(\Rightarrow S'=\dfrac{g\left(2.3-1\right)}{2}=24,5m\)

Answer 2

lâu lâu đổi gió tí :3